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| package com.aclihui.menu;
import android.graphics.Color; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.widget.RelativeLayout;
public class MainActivity extends AppCompatActivity { RelativeLayout customStyle;
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); }
final static int MENU_00=Menu.FIRST; final static int MENU_01=Menu.FIRST+1; final static int MENU_02=Menu.FIRST+2;
@Override public boolean onCreateOptionsMenu(Menu menu) {
menu.add(0,MENU_00,1,"红色"); menu.add(0,MENU_01,2,"灰色"); menu.add(0,MENU_02,3,"黑色"); return true; }
@Override public boolean onOptionsItemSelected(MenuItem item) {
customStyle=(RelativeLayout)findViewById(R.id.customStyle); switch (item.getItemId()) { case 1: customStyle.setBackgroundColor(Color.RED); break; case 2: customStyle.setBackgroundColor(Color.GRAY); break; case 3: customStyle.setBackgroundColor(Color.BLACK); break; } return true; } }
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